[ROOT] Query's

From: Nuno Almeida (nuno.almeida@iscte.pt)
Date: Thu Nov 14 2002 - 16:05:25 MET 

Hi all,

I have the following doubt:

How ROOT evaluate expression like "bx>100 && fNtracks <50" passed by
argument to a function like TTree:Draw()?
Because the expression is a char* .

I have the following situation:

char* expression="event->bx <180 && event->evt < 1000 &&event->ottmean<180";

for(Int_t i=0; i< nentries; i++){
      mytree->GetEvent(i);
      if(expression){
	tree->Fill();
      }
  }

ROOT has any function that allow me to do that ?

Best Regards

Nuno Almeida

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